U.S. Senators John McCain (Republican-Arizona), Joseph Lieberman (Independent-Connecticut), and Mark Kirk (Republican-Illinois) have released a statement in response to reports of the ongoing harassment and mistreatment of Pakistan's former ambassador to the United States, Husain Haqqani.

The statement says that the senators are “increasingly troubled by Ambassador Haqqani's treatment since he returned home to Pakistan, including the travel ban imposed on him.”

The statement urges Pakistani authorities to resolve the matter "swiftly and consistent with civilian rule of law.”

Pakistan's Supreme Court has barred Haqqani from traveling abroad while his alleged role in a dispute over a leaked memo is being investigated.

The controversy centers on a memo in which Pakistani civilian officials allegedly sought U.S. help to prevent a possible military coup in exchange for Pakistani concessions.